JMA-5300MkIIsm

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INDEX > 2.System Configulation > 2.3 Function System Diagram MULTI RAIN SEA 32bit bus SLOT ANTENNA Scanner Unit NKE-2103/2254 MOTOR B101 ROTARY JOINT ENCODER ΦA,ΦB,ΦZ FILTER MAG V101 DIODE LIMITER PULSE TRANS SWITCHING CIRCUIT PC201 DUMMY LOAD Tx Trigger/Pulse Width Tune Control Receiver Bandwidth Control IF AMP MH GENERATOR VIDEO AMP POWER SUPPLY CIRCUIT INTERFACE CIRCUIT AVR PC1001 DC+24V Speed control MOTOR CONTROL POWER PC1501 Rotation Control Status SAFETY SWITCH S101 Relay Filter Power Supply GYRO I/F NMEA I/F NMEA I/F NMEA I/F NMEA I/F NMEA I/F ISW unit TrackBall Buzzer PWR SW CPU RS422 I/F Signal Proc ASIC STC/FTC/CFAR IR/AVE/GZ alarm GAIN Encoder Key Matrix EBL VRM Radar Draw ASIC Scan convert Scan correlation Trail process Graphics ASIC Map draw Graphics draw Main CPU Communication User I/F Main control BP/BZ VD TI MTR+/- PWRCNT P12V +12V -12V +5V +3.3V OPTION SEL +12V ISW SEL RS485 I/F PWRCNT ADC SEL Sweep memory MTR+/- Sub CPU SIO SIO SIO SIO Operation Unit NCE-5171 LCD Monitor NWZ-173 19inch LCD I/F RGB P12V +12V +12V MIC(2103) or RF AMP (2254) BP/BZ VD TI MTR+/- PWRCNT DC24V -10% +50% GYRO LOG GPS COMPASS GPS PC NAV2 NAV1 Radar Process Unit NDC-1417 RS422 I/F Analog RGB External Display ARPA DSP OPTION Frame memory Frame memory Radar Echo Radar Trails Map Graphics CPU AIS DDR SDRAM work FROM program SRAM Back-up OPTION Fig.2-6: Function system diagram of display unit, Type <strong>JMA</strong>-5332-12 2-10
INDEX > 2.System Configulation > 2.3 Function System Diagram The functional system diagram of the system's display unit is shown in Fig.2-6. A. Starting the System Turning on the power switch of the operating unit starts the power supply circuit CBD-1655A, and the various power supply voltages are supplied to the I/F circuit CMH-2201 and to the radar process circuits. The CPUs in the display unit also start and perform the initial settings. 2 After the power is turned on, the local CPU in the radar process circuit CDC- 1332, the graphic CPU, the CPU in the AIS processing circuit CDC-1325 and the operation CPU in the operation circuit CCK-979 are released from their reset status, perform the initialization of the respective hardware items to which they are connected, and wait for control commands from the main CPU. The main CPU is released from the reset status and initializes the radar image/ display function before initializing the entire system. First, it send initial settings commands to the local CPU to initialize the radar signal settings, and it sends a communication initialization command to the operating unit CPU to initialize the operation functions. The main CPU also writes a program to the memory in the DSP of the ARPA process circuit to start the DSP and issue an initialization command to the CPU in the AIS process circuit to initialize the AIS process circuit. After that, the main CPU sets the internal status according to the sensor data input from the various communication lines, such as the GYRO I/F and GPS, and issues an initialization command to the scanner unit via the communication line to initialize the scanner unit. This concludes the initialization of the system. B. Circuit Functions TThe GYRO I/F unit NCT-59A processes the gyro signal, which is in the synchro or step format, calculates the true azimuth, and sends the true azimuth data to the radar process circuit at regular intervals using serial communication. As long as the GYRO I/F unit is receiving the gyro signal, it is supplied with power and the CPU operates even if the display unit power is turned off. Therefore, even if the display unit power is turned off, the GYRO I/F circuit can continue to calculate the true azimuth. The operating circuit CPU detects the operating status of the switches and dials of the operation panel and sends the operation data to the main CPU through the communication line. The radar signal process circuit in the radar process circuit digitalizes the radar signals it receives from the scanner unit (the radar video signal, the transmission timing signal, and the antenna rotation signal), suppresses unwanted waves, and draws and displays a radar image in accordance with the display screen. 2-11
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